Fire stop



FIG. 1: is a perspective view of a fire stop.

FIG. 2: is a front view of a fire stop as shown in FIG. 1.

FIG. 3: is a side view of a fire stop as shown in FIG. 1.

FIG. 4: is a top view of a fire stop as shown in FIG. 1; and,

FIG. 5: is a bottom view of a fire stop as shown in FIG. 1. 

The ornamental design for a fire stop, as shown and described. 